Product Description

YONGNUO Ultra-wide Angle Prime Lens YN*4mm F2.8
The diagonal angle of view is about **4°. For YN*4mm F2.8 helps to collect the vast landscape and giant structures, its easier to show a grand and solemn atmosphere.

Precision-machined Ultra-low Dispersion Lens and Aspherical Lens
YN*4mm F2.8 carries 2pcs of aspherical lens. One of the aspherical lens adopts ultra-low dispersion lens, which effectively compensates various optical aberration, reduce the color difference to the maximum, and provide excellent sharpness and color correction.

Precision-machined Abnormal Dispersion Lens
YN*4mm 2.8 adopts 1pcs of abnormal dispersion lens, which helps to better control the dispersion problem with super-wide angle and large aperture, and, helps to improve second order spectrum.

Glass Optical Lens, Multilayer Coating
The whole series of this product adopts glass optical lens and multilayer coating technology to effectively increase light transmittance and control backlight ghost image and glare.

Firmware Upgrade
N*4mm F2.8 is equipped with USD port. The users can download the latest firmware from the official YONGNUO website and update the lens to keep best compatibility and performance.

F2.8 Large Aperture
With F2.8 bright and large aperture, background blurred, subject highlighted.

Focus Modes: Auto Focus (AF) and Manual Focus (MF)
YN*4mm F2.8 supports auto focus and manual focus. The focus mode can be selected according to practical requirement.

7cps of Diaphragm Leaves
YN*4mm F2.8 has 7pcs of diaphragm leaves, which helps to take picture of circular defocused spots or helps to reduce the aperture and take picture of **-star effect.

Durable Metal Mount
YN*4mm F2.8 adopts chrome-plated and high-accuracy metal mount. Its wearable, corrosion-resistant, and highly consistent with the camera.  

Focus Distance Indicator
YN*4mm F2.8 is equipped with focus distance indicator. Its convenient for you to judge the distance and the depth of field.

Gold-plating Technology
The metal contacts adopts gold-plating technology to effectively improve signal conductivity and corrosion resistance.